Merge branch 'bnxt_en-fixes'

Michael Chan says:

====================
bnxt_en: Bug fixes

This series fixes a devlink bug and several XDP related bugs.  The
devlink bug causes a kernel crash on VF devices.  The XDP driver
patches fix and clean up the RX XDP path and re-enable header-data
split that was disabled by mistake when adding the XDP multi-buffer
support.
====================

Signed-off-by: David S. Miller <[email protected]>

Author: davem330

drivers/net/ethernet/broadcom/bnxt/bnxt.c

@@ -991,8 +991,7 @@ static struct sk_buff *bnxt_rx_multi_page_skb(struct bnxt *bp,
 	dma_addr -= bp->rx_dma_offset;
 	dma_unmap_page_attrs(&bp->pdev->dev, dma_addr, PAGE_SIZE, bp->rx_dir,
 			     DMA_ATTR_WEAK_ORDERING);
-	skb = build_skb(page_address(page), BNXT_PAGE_MODE_BUF_SIZE +
-					    bp->rx_dma_offset);
+	skb = build_skb(page_address(page), PAGE_SIZE);
 	if (!skb) {
 		__free_page(page);
 		return NULL;
@@ -1925,7 +1924,7 @@ static int bnxt_rx_pkt(struct bnxt *bp, struct bnxt_cp_ring_info *cpr,
 	dma_addr = rx_buf->mapping;
 
 	if (bnxt_xdp_attached(bp, rxr)) {
-		bnxt_xdp_buff_init(bp, rxr, cons, &data_ptr, &len, &xdp);
+		bnxt_xdp_buff_init(bp, rxr, cons, data_ptr, len, &xdp);
 		if (agg_bufs) {
 			u32 frag_len = bnxt_rx_agg_pages_xdp(bp, cpr, &xdp,
 							     cp_cons, agg_bufs,
@@ -1940,7 +1939,7 @@ static int bnxt_rx_pkt(struct bnxt *bp, struct bnxt_cp_ring_info *cpr,
 	}
 
 	if (xdp_active) {
-		if (bnxt_rx_xdp(bp, rxr, cons, xdp, data, &len, event)) {
+		if (bnxt_rx_xdp(bp, rxr, cons, xdp, data, &data_ptr, &len, event)) {
 			rc = 1;
 			goto next_rx;
 		}
@@ -3969,8 +3968,10 @@ void bnxt_set_ring_params(struct bnxt *bp)
 		bp->rx_agg_ring_mask = (bp->rx_agg_nr_pages * RX_DESC_CNT) - 1;
 
 		if (BNXT_RX_PAGE_MODE(bp)) {
-			rx_space = BNXT_PAGE_MODE_BUF_SIZE;
-			rx_size = BNXT_MAX_PAGE_MODE_MTU;
+			rx_space = PAGE_SIZE;
+			rx_size = PAGE_SIZE -
+				  ALIGN(max(NET_SKB_PAD, XDP_PACKET_HEADROOM), 8) -
+				  SKB_DATA_ALIGN(sizeof(struct skb_shared_info));
 		} else {
 			rx_size = SKB_DATA_ALIGN(BNXT_RX_COPY_THRESH + NET_IP_ALIGN);
 			rx_space = rx_size + NET_SKB_PAD +
@@ -5398,15 +5399,16 @@ static int bnxt_hwrm_vnic_set_hds(struct bnxt *bp, u16 vnic_id)
 	req->flags = cpu_to_le32(VNIC_PLCMODES_CFG_REQ_FLAGS_JUMBO_PLACEMENT);
 	req->enables = cpu_to_le32(VNIC_PLCMODES_CFG_REQ_ENABLES_JUMBO_THRESH_VALID);
 
-	if (BNXT_RX_PAGE_MODE(bp) && !BNXT_RX_JUMBO_MODE(bp)) {
+	if (BNXT_RX_PAGE_MODE(bp)) {
+		req->jumbo_thresh = cpu_to_le16(bp->rx_buf_use_size);
+	} else {
 		req->flags |= cpu_to_le32(VNIC_PLCMODES_CFG_REQ_FLAGS_HDS_IPV4 |
 					  VNIC_PLCMODES_CFG_REQ_FLAGS_HDS_IPV6);
 		req->enables |=
 			cpu_to_le32(VNIC_PLCMODES_CFG_REQ_ENABLES_HDS_THRESHOLD_VALID);
+		req->jumbo_thresh = cpu_to_le16(bp->rx_copy_thresh);
+		req->hds_threshold = cpu_to_le16(bp->rx_copy_thresh);
 	}
-	/* thresholds not implemented in firmware yet */
-	req->jumbo_thresh = cpu_to_le16(bp->rx_copy_thresh);
-	req->hds_threshold = cpu_to_le16(bp->rx_copy_thresh);
 	req->vnic_id = cpu_to_le32(vnic->fw_vnic_id);
 	return hwrm_req_send(bp, req);
 }
@@ -13591,14 +13593,17 @@ static int bnxt_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
 		return -ENOMEM;
 
 	bp = netdev_priv(dev);
-	SET_NETDEV_DEVLINK_PORT(dev, &bp->dl_port);
 	bp->board_idx = ent->driver_data;
 	bp->msg_enable = BNXT_DEF_MSG_ENABLE;
 	bnxt_set_max_func_irqs(bp, max_irqs);
 
 	if (bnxt_vf_pciid(bp->board_idx))
 		bp->flags |= BNXT_FLAG_VF;
 
+	/* No devlink port registration in case of a VF */
+	if (BNXT_PF(bp))
+		SET_NETDEV_DEVLINK_PORT(dev, &bp->dl_port);
+
 	if (pdev->msix_cap)
 		bp->flags |= BNXT_FLAG_MSIX_CAP;
 

drivers/net/ethernet/broadcom/bnxt/bnxt.h

@@ -591,12 +591,20 @@ struct nqe_cn {
 #define BNXT_RX_PAGE_SIZE (1 << BNXT_RX_PAGE_SHIFT)
 
 #define BNXT_MAX_MTU		9500
-#define BNXT_PAGE_MODE_BUF_SIZE \
+
+/* First RX buffer page in XDP multi-buf mode
+ *
+ * +-------------------------------------------------------------------------+
+ * | XDP_PACKET_HEADROOM | bp->rx_buf_use_size              | skb_shared_info|
+ * | (bp->rx_dma_offset) |                                  |                |
+ * +-------------------------------------------------------------------------+
+ */
+#define BNXT_MAX_PAGE_MODE_MTU_SBUF \
 	((unsigned int)PAGE_SIZE - VLAN_ETH_HLEN - NET_IP_ALIGN -	\
 	 XDP_PACKET_HEADROOM)
 #define BNXT_MAX_PAGE_MODE_MTU	\
-	BNXT_PAGE_MODE_BUF_SIZE - \
-	SKB_DATA_ALIGN((unsigned int)sizeof(struct skb_shared_info))
+	(BNXT_MAX_PAGE_MODE_MTU_SBUF - \
+	 SKB_DATA_ALIGN((unsigned int)sizeof(struct skb_shared_info)))
 
 #define BNXT_MIN_PKT_SIZE	52
 
@@ -2134,7 +2142,6 @@ struct bnxt {
 #define BNXT_DUMP_CRASH		1
 
 	struct bpf_prog		*xdp_prog;
-	u8			xdp_has_frags;
 
 	struct bnxt_ptp_cfg	*ptp_cfg;
 	u8			ptp_all_rx_tstamp;

drivers/net/ethernet/broadcom/bnxt/bnxt_xdp.c

@@ -177,7 +177,7 @@ bool bnxt_xdp_attached(struct bnxt *bp, struct bnxt_rx_ring_info *rxr)
 }
 
 void bnxt_xdp_buff_init(struct bnxt *bp, struct bnxt_rx_ring_info *rxr,
-			u16 cons, u8 **data_ptr, unsigned int *len,
+			u16 cons, u8 *data_ptr, unsigned int len,
 			struct xdp_buff *xdp)
 {
 	struct bnxt_sw_rx_bd *rx_buf;
@@ -191,13 +191,10 @@ void bnxt_xdp_buff_init(struct bnxt *bp, struct bnxt_rx_ring_info *rxr,
 	offset = bp->rx_offset;
 
 	mapping = rx_buf->mapping - bp->rx_dma_offset;
-	dma_sync_single_for_cpu(&pdev->dev, mapping + offset, *len, bp->rx_dir);
-
-	if (bp->xdp_has_frags)
-		buflen = BNXT_PAGE_MODE_BUF_SIZE + offset;
+	dma_sync_single_for_cpu(&pdev->dev, mapping + offset, len, bp->rx_dir);
 
 	xdp_init_buff(xdp, buflen, &rxr->xdp_rxq);
-	xdp_prepare_buff(xdp, *data_ptr - offset, offset, *len, false);
+	xdp_prepare_buff(xdp, data_ptr - offset, offset, len, false);
 }
 
 void bnxt_xdp_buff_frags_free(struct bnxt_rx_ring_info *rxr,
@@ -222,7 +219,8 @@ void bnxt_xdp_buff_frags_free(struct bnxt_rx_ring_info *rxr,
  * false   - packet should be passed to the stack.
  */
 bool bnxt_rx_xdp(struct bnxt *bp, struct bnxt_rx_ring_info *rxr, u16 cons,
-		 struct xdp_buff xdp, struct page *page, unsigned int *len, u8 *event)
+		 struct xdp_buff xdp, struct page *page, u8 **data_ptr,
+		 unsigned int *len, u8 *event)
 {
 	struct bpf_prog *xdp_prog = READ_ONCE(rxr->xdp_prog);
 	struct bnxt_tx_ring_info *txr;
@@ -255,8 +253,10 @@ bool bnxt_rx_xdp(struct bnxt *bp, struct bnxt_rx_ring_info *rxr, u16 cons,
 		*event &= ~BNXT_RX_EVENT;
 
 	*len = xdp.data_end - xdp.data;
-	if (orig_data != xdp.data)
+	if (orig_data != xdp.data) {
 		offset = xdp.data - xdp.data_hard_start;
+		*data_ptr = xdp.data_hard_start + offset;
+	}
 
 	switch (act) {
 	case XDP_PASS:
@@ -401,10 +401,8 @@ static int bnxt_xdp_set(struct bnxt *bp, struct bpf_prog *prog)
 		netdev_warn(dev, "ethtool rx/tx channels must be combined to support XDP.\n");
 		return -EOPNOTSUPP;
 	}
-	if (prog) {
+	if (prog)
 		tx_xdp = bp->rx_nr_rings;
-		bp->xdp_has_frags = prog->aux->xdp_has_frags;
-	}
 
 	tc = netdev_get_num_tc(dev);
 	if (!tc)

drivers/net/ethernet/broadcom/bnxt/bnxt_xdp.h

@@ -18,16 +18,16 @@ struct bnxt_sw_tx_bd *bnxt_xmit_bd(struct bnxt *bp,
 				   struct xdp_buff *xdp);
 void bnxt_tx_int_xdp(struct bnxt *bp, struct bnxt_napi *bnapi, int nr_pkts);
 bool bnxt_rx_xdp(struct bnxt *bp, struct bnxt_rx_ring_info *rxr, u16 cons,
-		 struct xdp_buff xdp, struct page *page, unsigned int *len,
-		 u8 *event);
+		 struct xdp_buff xdp, struct page *page, u8 **data_ptr,
+		 unsigned int *len, u8 *event);
 int bnxt_xdp(struct net_device *dev, struct netdev_bpf *xdp);
 int bnxt_xdp_xmit(struct net_device *dev, int num_frames,
 		  struct xdp_frame **frames, u32 flags);
 
 bool bnxt_xdp_attached(struct bnxt *bp, struct bnxt_rx_ring_info *rxr);
 
 void bnxt_xdp_buff_init(struct bnxt *bp, struct bnxt_rx_ring_info *rxr,
-			u16 cons, u8 **data_ptr, unsigned int *len,
+			u16 cons, u8 *data_ptr, unsigned int len,
 			struct xdp_buff *xdp);
 void bnxt_xdp_buff_frags_free(struct bnxt_rx_ring_info *rxr,
 			      struct xdp_buff *xdp);